The thermo emf of a thermocupule varies with the temperature θ of the hot junction as
E= aθ +bθ2 volt Where the ratio (a/b) is 700 °C. If the cold junction is kept at 0 °C, then the neutral temperature is
1. 700 °C
E= aθ +bθ2 volt Where the ratio (a/b) is 700 °C. If the cold junction is kept at 0 °C, then the neutral temperature is
Assertion: In an elastic collision between two bodies, the energy of each body is conserved.
Reason: The total energy of an isolated system is conserved.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion: A body can be at rest even when it is under the action of any number of external forces.
Reason: Vector sum of all the external forces is zero.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion: In a non-uniform circular motion, the acceleration of the particle is equal to sum of the tangential acceleration and the centripetal acceleration.
Reason: The two acceleration are perpendicular to each other.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion: A body can have acceleration even if its velocity is zero at that instant of time.
Reason: The body will be momentarily at rest when it reverses its direction of motion.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion: Work done in moving a charge between any two points in a uniform electric field is independent of the path followed by the charge, between these points.
Reason: Electrostatic forces are non-conservative.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Given below are two statements:
| Assertion (A): | In a transistor amplifier, the output voltage is always out of phase with the input voltage. |
| Reason (R): | The emitter base junction is reverse biased and the base collector junction is forward biased. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
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