Multiple Choice QuestionsConsider the following two statements
A) Kirchhoff junction law follows from the conservation of charge.
B) Kirchhoff's loop law follows from the conservation of energy
Which of the following is correct?
Both (A) and (B) are wrong
(A) Is correct and (B) is wrong
(A) is wrong and (B) is correct
(A) is wrong and (B) is correct
The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be
90
10
1.25
1.25
A current of 3 A flows through the 2 Ω resistor shown in the circuit. The power dissiated in the 5 Ω resistor is
diagram
4 W
2 W
1 W
1 W
A wire of a certain material is stretched slowly by ten percent. Its new resistance and specific resistance become respectively
1.2 times, 1.1 times
1.21 times, same
both remain the same
both remain the same
The resistance of an ammeter is 13 Ω and its scale is graduated for a current up to 100 A. After an additional shunt has been connected to this ammeter it becomes possible to measure currents up to 750 A by this meter. The value of shunt resistance is.
20 Ω
2 Ω
0.2 Ω
0.2 Ω
A steady current of 1.5 A flows through a copper voltameter for 10 min. If the electrochemical equivalent of copper is 30 x 10-5 g C-1, the mass of copper deposited on the electrode will be:
0.40 g
0.50 g
0.67 g
0.67 g
Three resistances P, Q, R each of 2 Ω and an unknown resistance S form the four arms of a Wheatstone's bridge circuit. When a resistance of 6 Ω is connected in parallel to S the bridge gets balanced. What is the value of S?
2 Ω
3 Ω
6 Ω
6 Ω
In the circuit shown, if a conducting wire is connected between points A and B, the current in this wire will
flow from A to B
flow in the direction which will be decided by the value of V
be zero
be zero
Switch
