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Multiple choice quiz: Fundamentals

<^< Assessment: Fundamentals | Course Index | Written Questions: Fundamentals >^>(:nl:)

>>frame round<< Question 1:

An alternating current has a frequency of 2 kHz. Which one of the following gives the time for one complete cycle?

(a) 0.5 ms
(b) 1 ms
(c) 2 ms >><<

>>id=example1 class=question margin=10px frame round<< Answer: A >><<

>>frame round<< Question 2:

Potential difference is measured in:

(a) amps
(b) ohms
(c) volts >><<

>>id=example2 class=question margin=10px frame round<< Answer: C >><<

>>frame round<< Question 3:

How many radians are there in 360°?

(a) 2
(b) &#960;
(c) 2&#960; >><<

>>id=example3 class=question margin=10px frame round<< Answer: C >><<

>>frame round<< Question 4:

A current of 2 A flows in a resistor of 6 &#937;. Which one of the following gives the potential difference that appears across the resistor?

(a) 0.33 V
(b) 3 V
(c) 12 V >><<

>>id=example4 class=question margin=10px frame round<< Answer: C >><<

>>frame round<< Question 5:

An electric field will appear between the plates of a capacitor when:

(a) the plates are shorted together
(b) the plates are connected to a battery
(c) the plates are connected to a lamp >><<

>>id=example5 class=question margin=10px frame round<< Answer: B >><<

>>frame round<< Question 6:

The prefix n is equivalent to a multiplier of:

(a) 10'^-6^'
(b) 10'^-9^'
(c) 10'^-12^' >><<

>>id=example6 class=question margin=10px frame round<< Answer: B >><<

>>frame round<< Question 7:

A battery of 24 V is connected across an unknown resistance. If a current of 0.5 A is supplied, which one of the following gives the value of the resistor?

(a) 6 &#937;
(b) 12 &#937; <<? (c) 48 &#937; >><<

>>id=example7 class=question margin=10px frame round<< Answer: C >><<

>>frame round<< Question 8:

A solenoid consists of turns of wire wound on an iron core. The strength of the magnetic flux produced in the core depends:

(a) only on the number of turns
(b) only on the current flowing in the wire
(c) on the product of the number of turns and the current flowing >><<

>>id=example8 class=question margin=10px frame round<< Answer: C >><<

>>frame round<< Question 9:

The prefix m is used to denote:

(a) mega
(b) micro
(c) milli >><<

>>id=example9 class=question margin=10px frame round<< Answer: C >><<

>>frame round<< Question 10:

Provided temperature does not vary, Ohm's Law states that:

(a) the product of potential difference to current flowing will be constant
(b) the ratio of potential difference to current flowing will be constant
(c) the sum of potential difference and current flowing will be constant >><<

>>id=example10 class=question margin=10px frame round<< Answer: B >><<

>>frame round<< Question 11:

The peak value of an alternating voltage is 100 V. Which one of the following gives the average value of the voltage measured over one complete cycle?

(a) 0 V
(b) 50 V
(c) 100 V >><<

>>id=example11 class=question margin=10px frame round<< Answer: A >><<

>>frame round<< Question 12:

In electrical circuits energy can be supplied by:

(a) resistors and capacitors
(b) capacitors and inductors
(c) batteries and generators >><<

>>id=example12 class=question margin=10px frame round<< Answer: C >><<

>>frame round<< Question 13:

Electric current is measured in:

(a) amps
(b) ohms
(c) volts >><<

>>id=example13 class=question margin=10px frame round<< Answer: A >><<

>>frame round<< Question 14:

Which one of the following gives the units of electric charge?

(a) Coulomb
(b) Joule
(c) Farad >><<

>>id=example14 class=question margin=10px frame round<< Answer: A >><<

>>frame round<< Question 15:

Electromotive force (e.m.f.) is provided by:

(a) a battery
(b) a lamp
(c) a resistor >><<

>>id=example15 class=question margin=10px frame round<< Answer: A >><<

>>frame round<< Question 16:

In terms of the fundamental SI units, which one of the following gives the units of electric charge?

(a) Ampere seconds (A s)
(b) Amperes per second (A s'^-1^')
(c) Seconds per ampere (s A'^-1^') >><<

>>id=example16 class=question margin=10px frame round<< Answer: A >><<

>>frame round<< Question 17:

The prefix k is equivalent to a multiplier of:

(a) 10'^2^'
(b) 10'^3^'
(c) 10'^6^' >><<

>>id=example17 class=question margin=10px frame round<< Answer: B >><<

>>frame round<< Question 18:

Which one of the following is TRUE?

(a) like charges repel one another
(b) unlike charges repel one another
(c) no force exists between charges of either polarity >><<

>>id=example18 class=question margin=10px frame round<< Answer: A >><<

>>frame round<< Question 19:

Which one of the following gives the units of electric power?

(a) Joule
(b) Volt
(c) Watt >><<

>>id=example19 class=question margin=10px frame round<< Answer: C >><<

>>frame round<< Question 20:

The symbol L is used to denote

(a) capacitance
(b) inductance
(c) loss >><<

>>id=example20 class=question margin=10px frame round<< Answer: B >><<

>>frame round<< Question 21:

The symbol used to denote charge in an electrical circuit is:

(a) C
(b) E
(c) Q >><<

>>id=example21 class=question margin=10px frame round<< Answer: C >><<

>>frame round<< Question 22:

An alternating current has 50 complete cycles in each second. Which one of the following gives the frequency of the current?

(a) 25 Hz
(b) 50 Hz
(c) 100 Hz >><<

>>id=example22 class=question margin=10px frame round<< Answer: B >><<

>>frame round<< Question 23:

A magnetic field surrounding a wire can be detected by means of:

(a) a compass
(b) a lamp
(c) a voltmeter >><<

>>id=example23 class=question margin=10px frame round<< Answer: A >><<

>>frame round<< Question 24:

One radian is approximately equal to:

(a) 57°
(b) 90°
(c) 180° >><<

>>id=example24 class=question margin=10px frame round<< Answer: A >><<

>>frame round<< Question 25:

Electrons are:

(a) negative charge carriers orbiting the nucleus of an atom
(b) positive charge carriers orbiting the nucleus of an atom
(c) uncharged particles present in the nucleus of an atom >><<

>>id=example25 class=question margin=10px frame round<< Answer: A >><<

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