Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice physics electric current through conductors study about cells electric cell types of cells

Three types of electric cells which provide current are:

  1. Button cell, solar cell & secondary cell

  2. Solar cell, electrolytic cell, electro chemical cell

  3. $(A)$ and $(B)$ both are correct

  4. Neither $(A)$ nor $(B)$ is correct
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Answer is C.

When a primary cell is used, chemical reactions in the battery use up the chemicals that generate the power; when they are gone, the battery stops producing electricity and is useless. In contrast, in a secondary cell, the reaction can be reversed by running a current into the cell with a battery charger to recharge it, regenerating the chemical reactants. 
The types of cells mentioned in option A and option are correct.
Hence, option C is correct.

Multiple choice physics electric current through conductors study about cells electric cell types of cells

What is the direction of flow of current inside a dry cell?

  1. <span>from $+$ve to $-$ve terminal</span>

  2. <span>from $-$ve to $+$ve terminal</span>

  3. <span>from $+$ve to $+$ve terminal</span>

  4. <span>from $-$ve to $-$ve terminal</span>
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The dry cell consists of a zinc can, electrolyte paste, and a carbon rod in the center. A chemical reaction takes place between the zinc can and the paste. Electrons flow from the negative (zinc) terminal to the positive (carbon) terminal. Electrons are then pumped back to the negative terminal.
Multiple choice physics electric current through conductors study about cells electric cell types of cells

The longer lead of a LED is always connected to the negative terminal of the battery and the shorter lead is connected to the posltlve terminal of the battery

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Answer is B.
The LED bulb has two leads. The lead connected to the positive terminal of battery is called anode and the lead connected to the negative terminal is cathode. The slightly longer lead than the other is always connected to the positive terminal and the shorter lead is connected to the negative terminal.
Hence, the given statement is false.

Multiple choice physics kinematics motion around us motion and rest moving things around us

A ball lying on the ground does not move on its own because:

  1. it has inertia

  2. it has no energy

  3. it does not want to move

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

According to Newtons's first law , body remains in its state unless acted by external force. This property of body is termed as Inertia.

Option A is correct.

Multiple choice physics kinematics motion around us motion and rest moving things around us

A tree in a park is in a state of _____with respect to the ground.

  1. rest

  2. motion

  3. data is insufficient

  4. both A and B
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This totally depends on the frame of refrence, any object is relatively at rest or moving.

earth as  frame of refrenece in this case, the tree is at rest.

Multiple choice physics kinematics motion around us motion and rest moving things around us

A book lying on a table is an example of -

  1. a body in motion

  2. a body at rest

  3. a body neither at rest nor in motion

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

when the position of a body does not change with respect to its surroundings and time the body is said to be in rest. A book lying on the table is at rest because its position with respect to other object on table or room is fix. 

Multiple choice physics kinematics motion around us motion and rest moving things around us

A book lying on a table is in a state of ____

  1. rest

  2. motion

  3. periodic motion

  4. linear motion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A book lying on the table is at rest. 


Since no net external force is acting on the book in this state and so it is not capable of moving the book.

Option A is correct.