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A dry cell of emf 1.6 V and internal resistance 0.10 Ω is connected to a resistor of resistance R Ω. If the current drawn from the cell is 2 A (i) What is the voltage drop across R? (ii) What is the energy dissipation in the resistor?

In Progress...

a gas is compressed from a volume of 2m3 to a volume of 1m3 at a constant pressure of 100N/m2. Then it is heated at constant volume by supplying 150J of energy. As a result, the internal energy of the gas increases/decreases by??

In Progress...

I read it in a textbook but didn't get it...
When knife is sharpened by pressing it against a grinding stone, the sparks fly off along the tangent to the grinding stone, on account of direction of inertia.
How the concept of direction of inertia is working here...could you be a little detailed??

In Progress...

a transparent bag filled with air forms a concave lens when it is immersed in water it behaves as?

In Progress...

are stationary waves progressive waves ? explain with proof and logics.

In Progress...

Which of the following is not an equation of state of a thermodynamic system?

Charles law
Ideal gas law
Van der Waals equation
Kirchoff's junction rule

In Progress...

Which of the following is NOT due to Bernoulli effect

a. raised tarpaulins on moving trucks
b. the curve of a baseball
c. the lift produced on an airplane
d. the floating of an iceberg

In Progress...

When the junctions of two dissimilar metals are maintained at different temperatures an electromotive force is is set up in the circuit of which these junctions are part. A pair of juntions of this kind and the effect are known respectively as:

a. thermistor and Peltier effect
b. resistance thermometer and Joule effect
c. pyrometer and Joule effect
d. thermocouple and Seebeck effect

In Progress...

The temperature at which the tungsten filament of a 12V and 36W lamp operates is 1730
oC
. If the temperature coefficient of resistance of tungsten is
6×10−3
/K, find the resistance of the lamp at a room temperature of 20oC

10:00Ω

0:45Ω

0:39Ω

4:00Ω

In Progress...

Steel ship ships are able to float on water even though steel is denser that water. This explained using the ------------- principle.

a. Archimedes
b. surface tension
c. Newton's
d. Joule's

In Progress...
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