1.
Determine the charge on capacitor of 10 μF in the following circuit.
2.
The specific resistance of a conductor increases with
3.
The charge flowing through a resistance R varies with time t as Q= at – bt², where a and b are positive constants. The total hreat produced in R is:
4.
A filament bulb (500 W, 100 V) is to be used in a 230 V main supply. When a resistance R is connected in series,it works perfectly and the bulb consumes 500 W. The value of R is:
5.
Identify the wrong statement.
6.
The current in a conductor varies with time as I = 2t + 3 t² where I is in ampere and t is in seconds. Electric charge flowing through a section of the conductor during t =2 s to t = 3 s is
7.
In the circuit shown, the value of each resistance is R, then equivalent resistance of the circuit between points A and B will be
8.
Current through wire Xy of circuit shown is
9.
In the circuit shown below, the current I₁ is
10.
What is the reading of voltmeter in the following figure?
11.
In the circuit element given here, if the potential at point B is zero, then the potential of A and D are respectively
12.
Two bulbs X and Y having the same voltage rating and of power 40 W and 60 W respectively are connected in series across a potential difference of 300 V, then
13.
If in the circuit shown below, the internal resistance of the battery is 1.5 Ω, then what is the potential difference between the points P and Q is
14.
When an electric heater is switched on, the current flowing through it (I) is plotted against time (t). Taking into account the variation of resistance with temperature, which of the following best represents the resulting curve?
15.
The figure shows a circuit diagram of a Wheatstone Bridge to measure the resistance G of the galvanometer. The relation P/Q = R/G will be satisfied when
16.
An ammeter gives full-scale deflection when current of 1.0 A is passed in it. To convert it into 10 A range ammeter, the ratio of its resistance and the shunt resistance will be
17.
50 Ω and 100 Ω resistors are connected in series. This connection is connected with a battery of 2.4. When a voltmeter of 100 Ω resistance is connected across 100 Ω resistor, then the reading of the voltmeter will be
18.
In a Wheatstone Bridge circuit of resistances P and S (opposite arm resistors) and resistances Q and R (remaining opposite arm resistor) connected with a battery in one diagonal and in second diagonal, a galvanometer (shape is parallelogram), for unbalanced Wheatstone Bridgem PS > QR,
19.
The mobility is the ratio of
20.
When temperature increases, the drift speed of electrons in a metal conductor
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