Reality aspects:
– The setting begins in the real world — the Grand Central Station in New York.
– References to modern life problems, such as worry, insecurity, and the rush of daily living, reflect actual 20th-century circumstances.
– Characters like Charley, his wife Louisa, and the mention of psychiatrists give a realistic framework.
Fantasy elements:
– The “third level” itself is imaginary; Grand Central is known to have only two levels.
– Charley’s description of the third level depicts 1894 New York — gaslights, old-style locomotives, and outdated currency — as if he had travelled back in time.
– The letter from Sam, written in 1894 and found among old papers, adds to the mystery and blurs the line between fact and imagination.
Interweaving of the two:
– The story keeps shifting between what can be explained logically (hallucination, wishful thinking) and what feels like a genuine time-travel episode.
– Readers are left uncertain whether Charley’s experience was a mental escape from reality or a real doorway into the past.
Conclusion: By blending authentic details of New York with the fictional idea of a hidden level leading to another era, the author creates a narrative where fantasy is rooted in reality, leaving it to the reader to decide what to believe.
A battery of emf \( E \) and internal resistance \( r \) is connected to a rheostat. When a current of 2A is drawn from the battery, the potential difference across the rheostat is 5V. The potential difference becomes 4V when a current of 4A is drawn from the battery. Calculate the value of \( E \) and \( r \).