Two capacitors of capacitances 2 μF and 3 μF are joined in series. Outer plate of first capacitor is at 1000 volt and outer plate of second capacitor is earthed (grounded). Now the potential on […]
The unit of electric permittivity is
Options
(a) volt/m² (b) joule/coulomb (c) farad/m (d) henry/m
Correct Answer:
farad/m
Explanation:
Electric permitivity has unit farad/m.
The magnetic flux linked with a circuit of resistance 100Ω increases from 10 to 60 Wb. The amount of induced charge that flows in the circuit is (in coulomb)
Options
(a) 0.5 (b) 5 […]
A coil of resistance and 1.0 H inductance is connected to an a.c. source of frequency 200/2π Hz. Phase angle between potential and current will be
Options
(a) 0⁰ (b) 30⁰ (c) 90⁰ […]
The unit of reactance is
Options
(a) ohm (b) volt (c) mho (d) newton
Correct Answer:
ohm
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
The frequency of fundamental tone in an open organ pipe of length 0.48 m is to 320 Hz. Speed of sound is 320 m/s. Frequency of fundamental tone in closed organ pipe will be
A capacitor is charged to 200 volt. It has a charge of 0.1 coulomb. When it is discharged, energy liberated will be
Options
(a) 1 J (b) 4 J (c) 10 J (d) 20 […]
A body moves with a uniform acceleration a and zero initial velocity. Another body B starts from the same point moves in the same direction with a constant velocity v.The two bodies meet after a […]
A horizontal straight conductor kept in north-south direction falls under gravity. Then
Options
(a) No e.m.f. is induced along the length of conductor (b) A current will be induced from south to north […]
Two discs of same material and thickness have radii 0.2 m and 0.6 m. Their moments of inertia about their axes will be in the ratio
Options
(a) 1 : 81 (b) 1 […]
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