IIT-JEE 2012 Paper 1 Offline | Current Electricity Question 39 | Physics

IIT-JEE 2012 Paper 1 Offline

MCQ (Single Correct Answer)

-1

Two large vertical and parallel metal plates having a separation of $$1$$ $$cm$$ are connected to a $$DC$$ voltage source of potential difference $$X$$. A proton is released at rest midway between the two plates. It is found to move at $${45^ \circ }$$ to the vertical JUST after release. Then $$X$$ is nearly

$$1 \times {10^{ - 5}}\,\,V$$

$$1 \times {10^{ - 7}}\,\,V$$

$$1 \times {10^{ - 9}}\,\,V$$

$$1 \times {10^{ - 10}}\,\,V$$

IIT-JEE 2011 Paper 1 Offline

MCQ (Single Correct Answer)

-0.5

A $$2$$ $$\mu F$$ capacitor is charged as shown in the figure. The percentage of its stored energy dissipated after the switch $$S$$ is turned to position $$2$$ is
IIT-JEE 2011 Paper 1 Offline Physics - Current Electricity Question 50 English

IIT-JEE 2011 Paper 1 Offline Physics - Current Electricity Question 50 English

$$0\% $$

$$20\% $$

$$75\% $$

$$80\% $$

IIT-JEE 2011 Paper 1 Offline

MCQ (Single Correct Answer)

-1

A meter bridge is set up as shown, to determine an unknown resistance X using a standard 10 $$\Omega$$ resistor. The galvanometer shows null point when tapping-key is at 52 cm mark. The end-corrections are 1 cm and 2 cm, respectively, for the ends A and B. The determined value of X is

IIT-JEE 2011 Paper 1 Offline Physics - Current Electricity Question 16 English

10.2 $$\Omega$$

10.6 $$\Omega$$

10.8 $$\Omega$$

11.1 $$\Omega$$

IIT-JEE 2010 Paper 1 Offline

MCQ (Single Correct Answer)

-1

Incandescent bulbs are designed by keeping in mind that the resistance of their filament increases with the increase in temperature. If at room temperature, 100, 60 and 40 W bulbs have filament resistances R₁₀₀, R₆₀ and R₄₀ respectively, the relation between these resistances is

$${1 \over {{R_{100}}}} = {1 \over {{R_{40}}}} + {1 \over {{R_{60}}}}$$

$${R_{100}} = {R_{40}} + {R_{60}}$$

$${R_{100}} > {R_{60}} > {R_{40}}$$

$${1 \over {{R_{100}}}} > {1 \over {{R_{60}}}} > {1 \over {{R_{40}}}}$$

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