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Instruction:

Total number of questions : 20 .

Time alloted : 30 minutes.

Each question carry 1 mark, no negative marks.

1.
Materials with lots of free electrons are called

2.
Eight-tenths coulomb passes a point in 4 s. The current in amperes is

3.
A wiper is the sliding contact in a

4.
A 120 resistor must carry a maximum current of 25 mA. Its rating should be at least

5.
Three 47 resistors are connected in parallel across a 110 volt source. The current drawn from the source is approximately

6.
Find the Thevenin equivalent (V _{TH} and R _{TH} ) between terminals A and B of the circuit given below.

7.
Referring to circuit given, if R _{1} is changed to a 68 resistor, what will be the current through it?

8.
A practical current source has a finite internal resistance.

9.
The duty cycle of a pulse waveform with a pulse width of 10 µs and a period of 100 µs is 25%.

10.
What is the capacitance when Q = 60 C and V = 12 V?

11.
A transformer with a 110 V primary has a 15:1 turns ratio. The load resistance, R_{L} , is 120 . What is the approximate voltage across the load?

13.
The voltages in Problem 5 are measured at a certain frequency. To make the resistor voltage less than the inductor voltage, the frequency is

14.
The resistor voltage in an RL circuit is always out of phase with the current.

16.
An RL high-pass filter consists of a 470 resistor and a 600 mH coil. The output is taken across the coil. The circuit's critical frequency is

18.
Referring to the given circuit, what is V _{TH} if V _{S} = 12 0° V?

19.
If the capacitor in an integrator becomes leaky,

20.
The rising and falling edges of a pulse waveform contain the higher frequency component.

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