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PHXII03:CURRENT ELECTRICITY

357141 Two bars of radius \(r\) and 2\(r\) are kept in contact as shown. An electric current \(i\) is passed through the bars. Which one of the following is correct?
supporting img

1 Heat produced in bar \(BC\) is 4 times the heat produced in bar \(AB\).
2 Potential difference across \(AB\) is 4 times that of across \(BC\).
3 Electric field in both halves is equal.
4 Current density across \(AB\) is double that of cross \(BC\).
PHXII03:CURRENT ELECTRICITY

357142 The supply voltage in a room is 120 \(V\). The resistance of the lead wires is \(6\Omega \). 60 \(W\) bulb is already switched on. What is the decrease of voltage across the bulb when a 240 \(W\) heater is switched on in parallel to the bulb?

1 13.3 \(V\)
2 Zero
3 2.9 \(V\)
4 10.4 \(V\)
PHXII03:CURRENT ELECTRICITY

357143 Assertion :
The coil of a heater is cut into two equal halves and only one of them is used into heater. The heater will now require half the time to produce the same amount of heat.
Reason :
The heat produced is directly proportional to square of current.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII03:CURRENT ELECTRICITY

357144 For ensuring dissipation of same energy in all three resistors \(\left(R_{1}, R_{2}, R_{3}\right)\) connected as shown in figure, their values must be related as
supporting img

1 \(R_{1}=R_{2}=R_{3}\)
2 \(R_{2}=R_{3}\) and \(R_{1}=4 R_{2}\)
3 \(R_{2}=R_{3}\) and \(R_{1}=\dfrac{R_{2}}{4}\)
4 \(R_{1}=R_{2}+R_{3}\)
AIIMS - 2005
PHXII03:CURRENT ELECTRICITY

357145 Assertion :
KWhr is a commercial unit used for expressing consumed electric energy.
Reason :
Kilo-Watt hour is the unit of electric power.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
NEET DIGITAL LIBRARY
PHXII03:CURRENT ELECTRICITY

357141 Two bars of radius \(r\) and 2\(r\) are kept in contact as shown. An electric current \(i\) is passed through the bars. Which one of the following is correct?
supporting img

1 Heat produced in bar \(BC\) is 4 times the heat produced in bar \(AB\).
2 Potential difference across \(AB\) is 4 times that of across \(BC\).
3 Electric field in both halves is equal.
4 Current density across \(AB\) is double that of cross \(BC\).
PHXII03:CURRENT ELECTRICITY

357142 The supply voltage in a room is 120 \(V\). The resistance of the lead wires is \(6\Omega \). 60 \(W\) bulb is already switched on. What is the decrease of voltage across the bulb when a 240 \(W\) heater is switched on in parallel to the bulb?

1 13.3 \(V\)
2 Zero
3 2.9 \(V\)
4 10.4 \(V\)
PHXII03:CURRENT ELECTRICITY

357143 Assertion :
The coil of a heater is cut into two equal halves and only one of them is used into heater. The heater will now require half the time to produce the same amount of heat.
Reason :
The heat produced is directly proportional to square of current.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII03:CURRENT ELECTRICITY

357144 For ensuring dissipation of same energy in all three resistors \(\left(R_{1}, R_{2}, R_{3}\right)\) connected as shown in figure, their values must be related as
supporting img

1 \(R_{1}=R_{2}=R_{3}\)
2 \(R_{2}=R_{3}\) and \(R_{1}=4 R_{2}\)
3 \(R_{2}=R_{3}\) and \(R_{1}=\dfrac{R_{2}}{4}\)
4 \(R_{1}=R_{2}+R_{3}\)
AIIMS - 2005
PHXII03:CURRENT ELECTRICITY

357145 Assertion :
KWhr is a commercial unit used for expressing consumed electric energy.
Reason :
Kilo-Watt hour is the unit of electric power.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
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PHXII03:CURRENT ELECTRICITY

357141 Two bars of radius \(r\) and 2\(r\) are kept in contact as shown. An electric current \(i\) is passed through the bars. Which one of the following is correct?
supporting img

1 Heat produced in bar \(BC\) is 4 times the heat produced in bar \(AB\).
2 Potential difference across \(AB\) is 4 times that of across \(BC\).
3 Electric field in both halves is equal.
4 Current density across \(AB\) is double that of cross \(BC\).
PHXII03:CURRENT ELECTRICITY

357142 The supply voltage in a room is 120 \(V\). The resistance of the lead wires is \(6\Omega \). 60 \(W\) bulb is already switched on. What is the decrease of voltage across the bulb when a 240 \(W\) heater is switched on in parallel to the bulb?

1 13.3 \(V\)
2 Zero
3 2.9 \(V\)
4 10.4 \(V\)
PHXII03:CURRENT ELECTRICITY

357143 Assertion :
The coil of a heater is cut into two equal halves and only one of them is used into heater. The heater will now require half the time to produce the same amount of heat.
Reason :
The heat produced is directly proportional to square of current.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII03:CURRENT ELECTRICITY

357144 For ensuring dissipation of same energy in all three resistors \(\left(R_{1}, R_{2}, R_{3}\right)\) connected as shown in figure, their values must be related as
supporting img

1 \(R_{1}=R_{2}=R_{3}\)
2 \(R_{2}=R_{3}\) and \(R_{1}=4 R_{2}\)
3 \(R_{2}=R_{3}\) and \(R_{1}=\dfrac{R_{2}}{4}\)
4 \(R_{1}=R_{2}+R_{3}\)
AIIMS - 2005
PHXII03:CURRENT ELECTRICITY

357145 Assertion :
KWhr is a commercial unit used for expressing consumed electric energy.
Reason :
Kilo-Watt hour is the unit of electric power.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
For More Updates join with Us
NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
PHXII03:CURRENT ELECTRICITY

357141 Two bars of radius \(r\) and 2\(r\) are kept in contact as shown. An electric current \(i\) is passed through the bars. Which one of the following is correct?
supporting img

1 Heat produced in bar \(BC\) is 4 times the heat produced in bar \(AB\).
2 Potential difference across \(AB\) is 4 times that of across \(BC\).
3 Electric field in both halves is equal.
4 Current density across \(AB\) is double that of cross \(BC\).
PHXII03:CURRENT ELECTRICITY

357142 The supply voltage in a room is 120 \(V\). The resistance of the lead wires is \(6\Omega \). 60 \(W\) bulb is already switched on. What is the decrease of voltage across the bulb when a 240 \(W\) heater is switched on in parallel to the bulb?

1 13.3 \(V\)
2 Zero
3 2.9 \(V\)
4 10.4 \(V\)
PHXII03:CURRENT ELECTRICITY

357143 Assertion :
The coil of a heater is cut into two equal halves and only one of them is used into heater. The heater will now require half the time to produce the same amount of heat.
Reason :
The heat produced is directly proportional to square of current.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII03:CURRENT ELECTRICITY

357144 For ensuring dissipation of same energy in all three resistors \(\left(R_{1}, R_{2}, R_{3}\right)\) connected as shown in figure, their values must be related as
supporting img

1 \(R_{1}=R_{2}=R_{3}\)
2 \(R_{2}=R_{3}\) and \(R_{1}=4 R_{2}\)
3 \(R_{2}=R_{3}\) and \(R_{1}=\dfrac{R_{2}}{4}\)
4 \(R_{1}=R_{2}+R_{3}\)
AIIMS - 2005
PHXII03:CURRENT ELECTRICITY

357145 Assertion :
KWhr is a commercial unit used for expressing consumed electric energy.
Reason :
Kilo-Watt hour is the unit of electric power.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
NEET DIGITAL LIBRARY
PHXII03:CURRENT ELECTRICITY

357141 Two bars of radius \(r\) and 2\(r\) are kept in contact as shown. An electric current \(i\) is passed through the bars. Which one of the following is correct?
supporting img

1 Heat produced in bar \(BC\) is 4 times the heat produced in bar \(AB\).
2 Potential difference across \(AB\) is 4 times that of across \(BC\).
3 Electric field in both halves is equal.
4 Current density across \(AB\) is double that of cross \(BC\).
PHXII03:CURRENT ELECTRICITY

357142 The supply voltage in a room is 120 \(V\). The resistance of the lead wires is \(6\Omega \). 60 \(W\) bulb is already switched on. What is the decrease of voltage across the bulb when a 240 \(W\) heater is switched on in parallel to the bulb?

1 13.3 \(V\)
2 Zero
3 2.9 \(V\)
4 10.4 \(V\)
PHXII03:CURRENT ELECTRICITY

357143 Assertion :
The coil of a heater is cut into two equal halves and only one of them is used into heater. The heater will now require half the time to produce the same amount of heat.
Reason :
The heat produced is directly proportional to square of current.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII03:CURRENT ELECTRICITY

357144 For ensuring dissipation of same energy in all three resistors \(\left(R_{1}, R_{2}, R_{3}\right)\) connected as shown in figure, their values must be related as
supporting img

1 \(R_{1}=R_{2}=R_{3}\)
2 \(R_{2}=R_{3}\) and \(R_{1}=4 R_{2}\)
3 \(R_{2}=R_{3}\) and \(R_{1}=\dfrac{R_{2}}{4}\)
4 \(R_{1}=R_{2}+R_{3}\)
AIIMS - 2005
PHXII03:CURRENT ELECTRICITY

357145 Assertion :
KWhr is a commercial unit used for expressing consumed electric energy.
Reason :
Kilo-Watt hour is the unit of electric power.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.