In the circuit shown in Fig.a voltage V is connected across lamp L. What changes would occur at lamp and the voltage V, if the resistance R is reduced in value?

The reading of ideal voltmeter V connected across R and the circuit shown is

An amplifier is represented by the circuit shown in Fig. Here r_(i) is the input resistance of the amplifier and the voltage V_(i) is appearing across it. This voltage is amplified by a factor A_(V) and appears across the load as voltage V_(0) An external voltage V_(s) is applied at the input terminals of the amplifier via series resistance R_(S). What will be the apparent gain A_(V)(=V_(0)//V_(s)) of the ampilifier in terms of A_(V), R_(S) and r_(i).

In the circuit shown in Fig. EP. 14.7, if the diode forward voltage drop is 0.3 V, the voltage differnece between A and B is

In a circuit shown in the figure voltmeter reads 30 V, when it is connected across 400 ohm resistance. Calculate what the same votlmeter will read, when connected across the 300 ohm resistance?

When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of resistor?

An electrical circuit is shown in the Fig. Calculate the potential difference across the resistance of 400 ohm, as will be measured by the voltmeter V of resistance 400 ohm, either by applying Kirchhoff’s rules or otherwise.

A 50 Hz a.c. source of 20 V is connected across R and C as shown in figure. The voltage across R is 12 V. The voltage across C is

A 12V resistance and an inductance of 0.05/pi H are connected in series. Across the end of this circuit an alternating voltage of 130 V and frequency 50 Hz is connected. Calculate the current in the circuit and the potential differnece across the inductance.