A. c.
B. c.
C. both d.c. and a.c.
D. none of the above
The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be
A. R Ω
B. 2R Ω
C. 4R Ω
D. 8R Ω
As per law of resistance, the resistance of the conductor is inversely proportional to its cross-sectional area i.e. it is inversely proportional to the square of the diameter of cross-sectional area of the conductor. As per same law of resistance, the resistance of the conductor is directly proportional to the length of the conductor.
A. 1.1 mV
B. 11.1 mV
C. 111 mV
D. 200 mV
Which quantity consists of a unit 1KWh ?
A. Energy
B. Time
C. Power
D. Charge
1 kWh is the amount of energy used by a 1 kW (1000 watt) resistance for 1 hour. Energy = Power × Time.
A. Positive
B. Zero
C. Negative
D. None of the above
A. Two’s complement only
B. Sign and magnitude and one’s complement only
C. Two’s complement and one’s complement only
D. All three representations
A. Increase the output impedance of transistor
B. Protect the transistor
C. Pass a.c. and block d.c.
D. Provide biasing