The physical quantity having the dimensions[M-1L-3T3A2] is

1. resistance

2. resistivity

3. electrical conductivity

4. electromotive force

Subtopic:  Dimensions |
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In the circuit shown the value of I in ampere is 

1. 1

2. 0.60

3. 0.4

4. 1.5

Subtopic:  Kirchoff's Voltage Law |
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The specific charge of a proton is 9.6 x 107 C/kg. The specific charge of an alpha particle will be

1. 9.6 X HY C/kg

2. 19.2 X HY C/kg

3. 4.8 X HY C/kg

4. 2.4 X HY C/kg

Subtopic:  Various Atomic Models |
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If \(\lambda_1 ~ and~ \lambda_2\) are the wavelengths of the first members of the Lyman and Paschen series respectively, then  \(\lambda_1 : \lambda_2\) is

1. 1 : 3

2. 1 : 30

3. 7 : 50

4. 7 : 108

Subtopic:  Spectral Series |
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Activity of a radioactive sample decreases to (1/3)rd of its original value in 3 days. Then, in 9 days its activity will become

1. (1/27) of the original value

2. (1/9) of the original value

3. (1/18) of the original value

4. (1/3) of the original value

Subtopic:  Radioactivity |
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A tuning fork A produces 4 beats/sec with another tuning fork B of frequency 320 Hz. On filing one of the prongs of A, 4 beats are again heard when sounded with the same fork B. Then, the frequency of the fork A before filing is

1. 328Hz

2. 316Hz

3. 324Hz

4. 320Hz

Subtopic:  Beats |
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If there were no gravity, which of the following will not be there for a fluid?

1. Viscosity

2. Surface tension

3. Pressure

4. Archimedes' upward thrust

Subtopic:  Archimedes' Principle |
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A choke is preferred to a resistance for limiting current in AC circuit because

1. choke is cheap

2. there is no wastage of power

3. choke is compact in size

4. choke is a good absorber of heat

Subtopic:  LR circuit |
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Velocity-time curve for a body projected vertically upwards is

1. parabola

2. ellipse

3. hyperbola

4. straight line

Subtopic:  Graphs |
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If r1 and r2 are the radii of the atomic nuclei of mass numbers 64 and 125 respectively, then the ratio (r1 / r2) is

1. 64125

2. 64125

3. 54

4. 45

Subtopic:  Various Atomic Models |
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