Medical Tests Medical Tests Certifications MCAT-TEST Questions & Answers

• Question 91:

  If a 5 k resistor and a 20 k resistor are connected in parallel, what is the resistance of the circuit?

  A. 4 k

  B. 4 m

  C. 15 k

  D. 10 k

  Correct Answer: A

  For resistors in parallel, the total resistance (Rt) is given by: 1/Rt = 1/R1 + 1/R2 +....1/Rn

• Question 92:

  If a wire carrying a current flowing into the screen is placed in a magnetic field pointing left, in which direction will the Lorentz force act on the charge carriers?

  A. to the left

  B. to the right

  C. upward

  D. out of the screen

  Correct Answer: C

  The right hand rule can be used to find the direction of the Lorentz force.

• Question 93:

  In which part of the spectrum is an electromagnetic wave with wavelength 532 nm?

  A. visible

  B. infrared

  C. microwave

  D. ultraviolet

  Correct Answer: A

  The wavelength 532 nm is used for green laser pointers.

• Question 94:

  If an atom undergoes alpha decay, by how many units will its mass number decrease?

  A. 2

  B. 3

  C. 4

  D. 1

  Correct Answer: C

  When an atom undergoes alpha decay, it emits an alpha particle which is just like a helium-4 atom composed of 2 protons and 2 neutrons.

• Question 95:

  What is the term for the temperature at which a material loses its permanent magnetism?

  A. the Bose temperature

  B. the Weiss temperature

  C. the Boyle temperature

  D. the Curie temperature

  Correct Answer: D

  This is also known as the Curie point.

• Question 96:

  As we move away from nucleus, the distance between the shells:

  A. remains same.

  B. increases.

  C. decreases.

  D. sometimes increase and sometime decreases.

  Correct Answer: C

• Question 97:

  Which metal have least tendency to form a positive ion?

  A. Aluminum

  B. Calcium

  C. Iron

  D. Sodium

  Correct Answer: C

• Question 98:

  Detergents are:

  A. natural products.

  B. synthetic products.

  C. Both A and B.

  D. None of above.

  Correct Answer: B

• Question 99:

  Which gas is formed when ammonium chloride is heated with aqueous sodium hydroxide?

  A. Ammonia

  B. Chlorine

  C. Hydrogen

  D. Nitrogen

  Correct Answer: C

• Question 100:

  The atomic size of an atom is:

  A. greater than the positive ion.

  B. smaller than the positive ion.

  C. greater than the negative ion.

  D. equal to covalent radius.

  Correct Answer: B