Calculate the electric field strength between two point charges, where one charge is ( 5 , μ C ) and the other is ( -3 , μ C ), and they are separated by a distance of ( 10 , cm ). The value of Coulomb's constant is ( 8.99 × 10^9 , Nm^2/C^2 ).

A wire of length ( 0.5 , m ) carries a current of ( 2 , A ). It experiences a force of ( 0.2 , N ) when placed perpendicular to a magnetic field. Calculate the magnitude of the magnetic field.

What is the force experienced by a charge of ( 2 , μ C ) placed in an electric field of intensity ( 4 , N/C )?

A current of ( 3 , A ) flows through a wire of resistance ( 5 , Ω ). What is the power dissipated by the wire?

Two parallel wires carry currents of ( 2 , A ) and ( 3 , A ) in the same direction. If the distance between them is ( 0.1 , m ), what is the force per unit length between them? (Assume the wires are infinitely long)

Which hormone is primarily responsible for regulating blood calcium levels in the human body?

• A) Insulin

• B) Glucagon

• C) Calcitonin

• D) Parathyroid hormone

What is the correct use of the past perfect tense in the following sentence: "By the time he arrived, she had already left"?

• A) "By the time he arrived, she has already left"

• B) "By the time he arrives, she already left"

• C) "By the time he arrived, she had already leave"

• D) "By the time he arrived, she had already leaves"

Riddle: I speak without a mouth and hear without ears. I have no body, but I come alive with the wind. What am I?

• A) Echo

• B) Cloud

• C) Whistle

• D) Shadow

If some trucks are blue and all blue things are cars, then some trucks are definitely cars. This statement is an example of:

• A) Inductive reasoning

• B) Deductive reasoning

• C) Analogical reasoning

• D) Abductive reasoning

Identify the error in the following sentence: "She went too the store to buy milk."

• A) went

• B) too

• C) store

• D) milk