Physics-
General
Easy
Question
Assertion : In practical application, power rating of resistance is not important.
Reason : Property of resistance remain same even at high temperature.
- If both assertion and reason are true and the reason is the correct explanation of the assertion.
- If both assertion and reason are true but reason is not the correct explanation of the assertion.
- If assertion is true but reason is false.
- If the assertion and reason both are false.
The correct answer is: If the assertion and reason both are false.
Related Questions to study
physics-
Assertion : Two electric bulbs of 50 and 100 W are given. When connected in series 50 W bulb glows more but when connected parallel 100 W bulb glows more.
Reason : In series combination, power is directly proportional to the resistance of circuit. But in parallel combination, power is inversely proportional to the resistance of the circuit.
Assertion : Two electric bulbs of 50 and 100 W are given. When connected in series 50 W bulb glows more but when connected parallel 100 W bulb glows more.
Reason : In series combination, power is directly proportional to the resistance of circuit. But in parallel combination, power is inversely proportional to the resistance of the circuit.
physics-General
physics-
Assertion : The electric bulbs glows immediately when switch is on.
Reason : The drift velocity of electrons in a metallic wire is very high.
Assertion : The electric bulbs glows immediately when switch is on.
Reason : The drift velocity of electrons in a metallic wire is very high.
physics-General
physics-
Assertion : In the following circuit emf is 2V and internal resistance of the cell is 1 
and R = 1 , then reading of the voltmeter is 1V.
Reason : V = E-ir where E = 2V, 
=1A and R = 1 .
Assertion : In the following circuit emf is 2V and internal resistance of the cell is 1 and R = 1 , then reading of the voltmeter is 1V.
Reason : V = E-ir where E = 2V, =1A and R = 1 .
physics-General
physics-
Two batteries, one of emf 18 volts and internal resistance 2 and the other of emf 12 volts and internal resistance 1 , are connected as shown in the figure. The voltmeter V will record a reading of :
Two batteries, one of emf 18 volts and internal resistance 2 and the other of emf 12 volts and internal resistance 1 , are connected as shown in the figure. The voltmeter V will record a reading of :
physics-General
physics-
For the network shown in the figure, the value of the current i is :
For the network shown in the figure, the value of the current i is :
physics-General
physics-
When a current flows in a wire, there exists an electric field in the direction of :
When a current flows in a wire, there exists an electric field in the direction of :
physics-General
physics-
When the key K is pressed at time t = 0, then which of the following statements about the current I in the resistor AB of the given circuit is true ?
When the key K is pressed at time t = 0, then which of the following statements about the current I in the resistor AB of the given circuit is true ?
physics-General
physics-
In the following figure, current through 3 resistor is 0.8 amp; then the potential drop through 4 resistor is :
In the following figure, current through 3 resistor is 0.8 amp; then the potential drop through 4 resistor is :
physics-General
physics-
In the figure shown below the e.m.f. of the cell is 2V and internal resistance is negligible. The resistance of the voltmeter is 80 ohm. The reading of voltmeter will be :
In the figure shown below the e.m.f. of the cell is 2V and internal resistance is negligible. The resistance of the voltmeter is 80 ohm. The reading of voltmeter will be :
physics-General
physics-
In the circuit shown in the following figure, the potential difference between points A and B will be:
In the circuit shown in the following figure, the potential difference between points A and B will be:
physics-General
physics-
There is no current in a 2 resistance, then the equivalent resistance of the given circuit is :
There is no current in a 2 resistance, then the equivalent resistance of the given circuit is :
physics-General
physics-
A cell when balanced with potentiometer gave a balance length of 50 cm. Then a 4.5 external resistance is introduced in the circuit. Now it is balanced on 45 cm. The internal resistance of the cell is :
A cell when balanced with potentiometer gave a balance length of 50 cm. Then a 4.5 external resistance is introduced in the circuit. Now it is balanced on 45 cm. The internal resistance of the cell is :
physics-General
physics-
Five resistances have been connected as shown in the figure. The effective resistance between the points A and B is :
Five resistances have been connected as shown in the figure. The effective resistance between the points A and B is :
physics-General
physics-
In the following figure, the resistance of the galvanometer G is 50 ohm. Of the following alternatives in which case are the currents arranged strictly in the order of decreasing magnitudes with the larger coming earlier :
In the following figure, the resistance of the galvanometer G is 50 ohm. Of the following alternatives in which case are the currents arranged strictly in the order of decreasing magnitudes with the larger coming earlier :
physics-General
physics-
Eels are able to generate current with biological cells called electroplaques The electroplaques in an eel are arranged in 100 rows, each row stretching horizontally along the body of fish containing 5000 electroplaques The arrangement is suggestively shown in the figure Each electroplaque has an e.m.f. of 0.15 V and internal resistance of 0.25 W. The water surrounding the eel completes a circuit between the head and its tail. If the water surrounding it has a resistance of 500W, the current an eel can produce in water is about :
Eels are able to generate current with biological cells called electroplaques The electroplaques in an eel are arranged in 100 rows, each row stretching horizontally along the body of fish containing 5000 electroplaques The arrangement is suggestively shown in the figure Each electroplaque has an e.m.f. of 0.15 V and internal resistance of 0.25 W. The water surrounding the eel completes a circuit between the head and its tail. If the water surrounding it has a resistance of 500W, the current an eel can produce in water is about :
physics-General
