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1. An electric lamp whose resistance is 10 ohm, and a conductor of 2 ohm resistance are connected in series with a 6 V battery. The total current through the circuit and the potential difference across the electric lamp are? (NTSE Panchkula, Chandigarh, Stage-I, 2012-13)
3.6A,6V
0.5A,5V
2.0 A, 0.2 V
0.3 A, 3 V
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2. Voice of which of the following is likely to have the maximum frequency? (NTSE, Panchkula, Chandigarh, Stage-I, 2012-13)
Man.
Cow.
Bird.
Dog.
3. Velocity of sound is maximum in (NTSE, Rajasthan, Stage-I, 2013-14)
Water.
Air.
Oil.
Iron.
4. If the velocity of a wave is 400 m/sec and frequency is 100 Hz, then the wavelength of the wave is (NTSE, Madhya Pradesh, Stage-I, 2014-15)
6m.
2.8m.
3m.
4m.
5. Frequency of Ultrasonic waves is (NTSE, Madhya Pradesh, Stage-I, 2014-15)
Less than 20,000 Hz.
Greater than 20,000 Hz.
Less than 20 Hz.
1000 Hz.
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