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Quantum Tunnelling Through Potential Barrier

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1. If the transmission coefficient T for a potential barrier is 0.8, what percentage of particles incident on the barrier are reflected?

a: 10% Explanation

Explanation

b: 20% Explanation

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c: 30% Explanation

Explanation

d: 50% Explanation

Explanation

2. How does increasing the width of a potential barrier affect the transmission coefficient?

a: It decreases the transmission coefficient Explanation

Explanation

b: It increases the transmission coefficient Explanation

Explanation

c: It has no effect on the transmission coefficient Explanation

Explanation

d: It causes the transmission coefficient to oscillate Explanation

Explanation

3. Which of the following factors increases the probability of quantum tunnelling?

a: Higher barrier height Explanation

Explanation

b: Lower particle energy Explanation

Explanation

c: Narrower barrier width Explanation

Explanation

d: Larger particle mass Explanation

Explanation

4. In quantum tunnelling, what happens to the wavefunction inside the potential barrier?

a: It oscillates with constant amplitude Explanation

Explanation

b: It becomes zero immediately Explanation

Explanation

c: It decreases exponentially Explanation

Explanation

d: It increases exponentially Explanation

Explanation

5. Quantum tunnelling is essential for which real-world physical phenomenon?

a: Planetary motion Explanation

Explanation

b: Alpha particle emission in radioactive decay Explanation

Explanation

c: Reflection of light from a mirror Explanation

Explanation

d: Magnetic repulsion Explanation

Explanation

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