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Browse complete papersA light bulb is rated at 200 W for a 400 V supply. Find the resistance of the bulb.
800 Ω
234 Ω
758 Ω
34 Ω
Correct answer
800 Ω
The equipotential surface around a point charge has the shape of a
Rectangle
Square
Triangle
Sphere
Correct answer
Rectangle
The holding current of the silicon controlled rectifier is
Greater than latching current
Less than latching current
Equal to latching current
Not equal to latching current
Correct answer
Greater than latching current
_______ is the most damaging type of UV radiation.
UVB
UVC
None of the options
UVA
Correct answer
UVB
The ________ possessed by an object is the energy present in it by virtue of its position or configuration.
Potential energy
Mechanical energy
Thermal energy
Electrical energy
Correct answer
Potential energy
The forbidden energy gap in Germanium at 0 K is about
5 eV
6 eV
2 eV
0.78 eV
Correct answer
5 eV
The resultant of two vectors is maximum, when the vectors are
None of the options
Acting in the opposite directions
Acting in the same direction
At right angles
Correct answer
None of the options
The product of the mass and acceleration is equal to
Momentum
Force
Displacement
Velocity
Correct answer
Momentum
The storage battery of a car has an EMF of 12 V. If the internal resistance of the battery is 0.5 Ω, what is the maximum current that can be drawn from the battery?
40 A
24 A
30 A
55 A
Correct answer
40 A
An object is thrown vertically upwards and rises to a height of 7.2 m. Calculate the time taken by the object to reach the highest point. (Take g = 10 ms-2)
1.2 s
1.97 s
1.53 s
0.8 s
Correct answer
1.2 s