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**1. A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be?**

(A) 4 times

(B) Double

(C) Halved

(D) one-fourth

**2. Time taken by an 836W heater to heat one liter of water iron 10o C to 400 C is?**

(A) 50s

(B) 100s

(C) 150s

(D) 200s

**3. The thermo-emf of a thermocouple varies with the temperature θ of the hot junction as E = a θ ^{2} in volts where the ration a/b is 700^{o} C. if the cold junction is kept at 0^{o} C, then the neutral temperature is?**

(A) 700

^{o}C

(B) 350

^{o}C

(C) 1400

^{o}C

(D) No neutral temperature is possible for this thermocouple

**4. The electrochemical equivalent of metal is 3.3×10 ^{−7} kg per coulomb. The mass of the metal liberated at the cathode when a 3 A current is passed for 2 seconds, will be?**

(A) 19.8 x 10

^{-7}

(B) 9.9 x 10

^{-7}

(C) 6.6 x 10

^{-7}

(D) 1.1 x 10

^{-7}

**5. A 220 volt, 1000 watt bulb is connected across a 110-volt mains supply. The power consumed will be?**

(A) 1000 watt

(B) 750 watt

(C) 500 watt

(D) 250 watt

**6. An electric motor operates at 20 rev/sec. What will be the approximate power delivered by the motor if it supplies a torque of 75 N-m?**

(A) 1550 W

(B) 4040 W

(C) 7730 W

(D) 9420 W

**7. The negative Zn pole of a Daniel cell, sending a constant current through a circuit, decreases in mass by 0.13 g in 30 minutes. If the electrochemical equivalence Cu pole in this times is?**

(A) 0.242g

(B) 0.180g

(C) 0.141g

(D) 0.126g

**8. 2 liters kept in a kettle are heated by 1 KW power source. Kettle is open and it loses heat at the rate of 160 J/s. The time taken for the temperature of kettle to change from 27 ^{o} C to 77^{o} C is?**

(A) 8 min 20 sec

(B) 6 min 20 sec

(C) 5 min

(D) 7 min

**9. An ideal gas enclosed in an insulated vessel is heated through a coil of resistance 100 Ω by passing a current of 1 A for 5 minutes, then change in internal energy of the gas is?**

(A) 0 KJ

(B) 30 KJ

(C) 10 KJ

(D) 20 KJ

**10. When an ideal gas filled in a closed vessel is heated through 1oC, its pressure increases by 0.4%, the initial temperature of the gas was?**

(A) 250 K

(B) 2500 K

(C) 250^{o} K

(D) 25^{o} K

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