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Browse complete papersThree resistors 3 Ω, 4 Ω and 5 Ω, are combined in parallel. What is the total resistance of the combination?
47/60 Ω
23 Ω
60/47 Ω
51 Ω
Correct answer
47/60 Ω
How many kilometres make one nautical mile?
1.536
1
1.852
1.756
Correct answer
1.536
A pure inductor of 25.0 mH is connected to a source of 220 V. Find the RMS current in the circuit if the frequency of the source is 80 Hz.
37.78 A
12.12 A
17.51 A
52.78 A
Correct answer
37.78 A
The inherent property of a body by virtue of which it resists any change in its state of rest or uniform motion in a straight line is called
Volume
Force
Inertia
Density
Correct answer
Volume
A light bulb is rated at 100 W for a 210 V supply. Find the RMS current through the bulb.
8.99 A
3.56 A
0.476 A
34 A
Correct answer
8.99 A
Which scientist used a torsion balance having greater sensitivity, to find the universal gravitational constant G?
Galileo
Isaac Newton
Henry Cavendish
Kepler
Correct answer
Galileo
What is the SI unit of pressure?
Newton
Joule
Pascal
Hertz
Correct answer
Newton
A body of mass 15 kg has its speed reduced from 30 km/h to 18 km/h in 4.0 seconds. Calculate the approximate change in kinetic energy.
124 J
333 J
360 J
90 J
Correct answer
124 J
A 100-gram ball is kept on the top of a building of 70 m height. Find the potential energy of the ball (assume g = 10 m/s2).
50 J
80 J
70 J
60 J
Correct answer
50 J
The tangent drawn at any point on the line of force gives the direction of force acting on a _________ at that point.
Negative charge only
Both positive and negative charges
Neither positive nor negative charge
Positive charge only
Correct answer
Negative charge only