If an A.C. mains supply is given to be 220 V, what would be the average e.m.f.
If an A.C. mains supply is given to be 220 V, what would be the average e.m.f. during a positive half cycle?
Options
(a) 256 V (b) 512 V (c) 386 V (d) 198 […]
MH2002
Two closed pipes produce 10 beats per second when emitting their fundamental nodes.
Two closed pipes produce 10 beats per second when emitting their fundamental nodes. If their lengths are in the ratio of 25:26, then their fundamental frequencies in Hz are
Options
(a) 270280 (b) […]
If wavelength of a wave is λ=6000 Å, then wave number will be
If wavelength of a wave is λ=6000 Å, then wave number will be
Options
(a) 166×10³ m⁻¹ (b) 16.6×10⁻¹ m⁻¹ (c) 1.66×10⁶ m⁻¹ (d) 1.66×10⁷ m⁻¹
Correct Answer:
1.66×10⁶ m⁻¹
Explanation:
No explanation […]
A condenser has a capacity 2 μF and is charged to a voltage of 50 V. The energy
A condenser has a capacity 2 μF and is charged to a voltage of 50 V. The energy stored is
Options
(a) 25×10⁵ joule (b) 25 joule (c) 25×10 erg (d) 25×10³ erg
Correct […]
The current in the coil of inductance 5H decreases at the rate of 2 A/s
The current in the coil of inductance 5H decreases at the rate of 2 A/s. The induced e.m.f is
Options
(a) 2 V (b) 5 V (c) 10 V (d) -10 V
Correct […]
Reactance of a capacitor of capacitance C µF for A.C freqency (400 / π) Hz is 25 ohm
Reactance of a capacitor of capacitance C µF for A.C freqency (400 / π) Hz is 25 ohm. The value of C is
Options
(a) 25 µF (b) 100 µF (c) 75 µF […]