Physics-
General
Easy

Question

When an ammeter of negligible internal resistance is inserted in series with circuit it reads 1A. When the voltmeter of very large resistance is connected across X it reads 1V. When the point A and B are shorted by a conducting wire, the voltmeter measures 10 V across the battery. The internal resistance of the battery is equal to

  1. zero    
  2. 0.5 capital omega    
  3. 0.2 capital omega    
  4. 0.1 capital omega    

The correct answer is: 0.2 capital omega

Related Questions to study

General
physics-

A wire has a non-uniform cross-section as shown in figure. A steady current flows through it. The drift speed of electrons at points P and q is vP and vQ.

A wire has a non-uniform cross-section as shown in figure. A steady current flows through it. The drift speed of electrons at points P and q is vP and vQ.

physics-General
General
physics-

Two light vertical springs with equal natural lengths and spring constants k1 and k2 are separated by a distance l) Their upper ends are fixed to the ceiling and their lower ends to the ends A and B of a light horizontal rod AB. A vertical downwards force F is applied at point C on the rod AB will remain horizontal in equilibrium if the distance AC is

Two light vertical springs with equal natural lengths and spring constants k1 and k2 are separated by a distance l) Their upper ends are fixed to the ceiling and their lower ends to the ends A and B of a light horizontal rod AB. A vertical downwards force F is applied at point C on the rod AB will remain horizontal in equilibrium if the distance AC is

physics-General
General
physics-

The spool shown in figure is placed on rough horizontal surface and has inner radius r and outer radius R. The angle q between the applied force and the horizontal can be varied. The critical angle (q) for which the spool does not roll and remains stationary is given by

The spool shown in figure is placed on rough horizontal surface and has inner radius r and outer radius R. The angle q between the applied force and the horizontal can be varied. The critical angle (q) for which the spool does not roll and remains stationary is given by

physics-General
parallel
General
physics-

A uniform rod of length L and weight W is suspended horizontally by two vertical ropes as shown. The first rope is attached to the left end of the rod while the second rope is attached a distance L 4 from the right end. The tension in the second rope is

A uniform rod of length L and weight W is suspended horizontally by two vertical ropes as shown. The first rope is attached to the left end of the rod while the second rope is attached a distance L 4 from the right end. The tension in the second rope is

physics-General
General
physics-

A uniform cylinder rests on a cart as shown. The coefficient of static friction between the cylinder and the cart is 0.5. If the cylinder is 4 cm in diameter and 10 cm in height, which of the following is the minimum acceleration of the cart needed to cause the cylinder to tip over?

A uniform cylinder rests on a cart as shown. The coefficient of static friction between the cylinder and the cart is 0.5. If the cylinder is 4 cm in diameter and 10 cm in height, which of the following is the minimum acceleration of the cart needed to cause the cylinder to tip over?

physics-General
General
physics-

A uniform ladder of length 5m is placed against the wall as shown in the figure. If coefficient of friction m is the same for both the walls, what is the minimum value of mu for it not to slip?

A uniform ladder of length 5m is placed against the wall as shown in the figure. If coefficient of friction m is the same for both the walls, what is the minimum value of mu for it not to slip?

physics-General
parallel
General
physics-

A smooth rod of length l is kept inside a trolley at an angle theta as shown in the figure. What should be the acceleration a of the trolley so that the rod remains in equilibrium with respect to it?

A smooth rod of length l is kept inside a trolley at an angle theta as shown in the figure. What should be the acceleration a of the trolley so that the rod remains in equilibrium with respect to it?

physics-General
General
physics-

Find minimum height of obstacle so that the sphere can stay in equilibrium

Find minimum height of obstacle so that the sphere can stay in equilibrium

physics-General
General
physics-

A homogeneous cubical brick lies motionless on a rough inclined surface. The half of the brick which applies greater pressure on the plane is :

A homogeneous cubical brick lies motionless on a rough inclined surface. The half of the brick which applies greater pressure on the plane is :

physics-General
parallel
General
chemistry-

Which of the following metal salts gives a red and opaque borax bead in the reducing flame (in cold) ?

Which of the following metal salts gives a red and opaque borax bead in the reducing flame (in cold) ?

chemistry-General
General
chemistry-

CoS (black) obtained in group IV of salt analysis is dissolved in aqua regia and is treated with an excess of NaHCO3 and then Br2 water. An apple green coloured stable complex is formed. It is :

CoS (black) obtained in group IV of salt analysis is dissolved in aqua regia and is treated with an excess of NaHCO3 and then Br2 water. An apple green coloured stable complex is formed. It is :

chemistry-General
General
chemistry-

Which of the following is/are correctly matched ?

Which of the following is/are correctly matched ?

chemistry-General
parallel
General
chemistry-

In which of the following pairs the precipitates are red and black coloured respectively and both precipitates are soluble in excess KI solution ?

In which of the following pairs the precipitates are red and black coloured respectively and both precipitates are soluble in excess KI solution ?

chemistry-General
General
chemistry-

When chlorine (Cl2) water in excess is added to a salt solution containing chloroform, chloroform layer turns pale yellow. Salt contains :

When chlorine (Cl2) water in excess is added to a salt solution containing chloroform, chloroform layer turns pale yellow. Salt contains :

chemistry-General
General
chemistry-

Zinc pieces are added to acidified solution of SO32 – . Gas liberated can :

Zinc pieces are added to acidified solution of SO32 – . Gas liberated can :

chemistry-General
parallel

card img

With Turito Academy.

card img

With Turito Foundation.

card img

Get an Expert Advice From Turito.

Turito Academy

card img

With Turito Academy.

Test Prep

card img

With Turito Foundation.